So I was reading thru Motordyne's website and read up on 5/16" and 1/2" plenum spacers. Have a few questions if you can help that would be nice! =)

1. What is the difference between basic, iso thermal, & copper iso thermal? I am guessing heat conductivity? Any difference in performance?

2. For those with the 1/2", it says your engine cover won't fit. Should I go with 5/16" and keep my engine cover, or 1/2" (better sounding and more hp, even if its only 2 hp) and not have an engine cover? What are the workarounds of not having an engine cover?

3. Would like to get the MREV. Is there more than 1 type? I have an 06 5AT LP Coupe. Which one is the most suitable for my car?

Thanks guys!

get the 5/16" iso thermal spacer

unless you plan on a tune...dont get the mrev2 and spacer combo

Where can I get a tune? What does it include? How much would it cost?
Can this be done by the dealership?

you can get the technosquare reflash. you can search for the details. or you can get a piggyback system like the turboxs utec or greddy emanage and get it professionally tuned at a performance shop. there should be a ton in CA. just browse the site, you'll learn a ton.

so what does it cost to get tune up??

Check out this link for Technosquare
http://www.technosquareinc.com/g35.htm

It costs $495 and you have the $100 option of them putting it on the dyno if you decide to go there in person. Tadashi has different programs for different mods and it's all the same price, so be sure to tell them about all the mods you have.

Get it. I'm glad I did! I highly recommend going in person and having them dyno your car before and after the upgrade.